server issues

[camkill180]

hey guys, i am killcam180 (the name was already taken here) i have an issue with my tekkit, i can't find any servers that work, every single one that i have been on has tried loading and then said that the server client has expired, what does this mean and what can i do about it?

i am running the recommended build for tekkit which is putting it at 1.5.2 and have tried going onto servers made for the 1.5.2 mod as well as newer ones but it just doesn't work, any help will greatly appreciated thank you

-killcam180